The problem is that you have to analyze the design in an appropriate manner. So if Year is crossed with the other factors, then it can't be a split-split plot (I don't think). So, I think this is the analysis Year and Nematode and their interaction is the whole plot, treatment is plot, cereal cultivar nested within Year is subplot. So this is my analysis proc mixed; class year blk nem trt cultivar; model lgsprCysts100=nem|year trt trt*nem trt*year trt*nem*year cultivar(year) cultivar(year)*nem cultivar(year)*trt cultivar(year)*new*trt; random blk blk*trt blk*trt*nem blk*trt*year blk*trt*year*nem; run; Maybe I'm way off. What do you think, ?
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